Anker 325 Power Bank (PowerCore Essential 20K), 20000mAh Battery with High-Speed PowerIQ Technology for iPhone Series, Samsung Galaxy, and More (USB-C Input Only, 2)

My Anker Powercore II (10000 KWh) compact that I've used very frequently since 2019 is finally losing some of its charge capacity. It will still charge my phone from almost zero battery to 100% while watching videos and still have some reserve, the upgrade was a no-brainer. I bought TWO, since the price was very low for Anker quality. They're built like tanks, look great, and have double the capacity as my old one. They take quite a bit of time to recharge, but that's always the case with any high-capacity battery. If these last as long as my old one, I will be beyond pleased!

Product excellent and great customer service

I received my product. Someone else took it by mistake and then returned it.

20,000mah is great

Pros: Can charge multiple times off of one chargeCons: slow to charge, one of the two stopped working after about 3 months. I bought Anker instead of a cheaper brand because they're supposedly more reliable but this is the worst longevity of any of my charge packs that I've actually paid money for.

5 watts maximum charging rate is obsolete. Of course there are those of us out there who can wait all day for our devices to charge, but I suspect that is a tiny minority. Anker now has power banks that are much more versitle and with much faster charging rates. I made the mistake of not looking closely before buying this product, and immediately returned it - purchasing another of the Anker power banks that are much better in every way. Yes they cost more but there is real value in what they cost. And they are the highly rated Anker brand.The big problem I have is that instead of being able to return these directly to Amazon I had to go old school and print a shipping lable and find a box to send them directly to Anker. I have had problems getting my printer to work and it took more than an hour to get a printed label - my bad. Still, I will think twice before buying another Anker product for this reason.

I'm very disappointed in this purchase. I've been a long-term customer of Anker batteries, but no more. I purchased a pair of batteries and when I received them, only one worked. I asked for a product replacement for just the one battery. However, I received 2 more batteries and neither one of them worked. Very frustrating to have spent $21 and only 1 battery worked out of the 4 that were shipped to me. I'll find a new brand going forward

Little to no user documentation either in the box or on Anker's website.